Excitonic state in anatase TiO2 single crystal

N. Hosaka, T. Sekiya, S. Kurita

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

Temperature dependence of polarized absorption near the band gap was measured for as-grown anatase single crystals and annealed ones which were heat-treated in oxygen atmosphere. The steepness index obtained indicates that an exciton is self-trapped. An absorption band appears at 2.9 eV after heat treatment. A broad luminescence was observed at 2.3 eV. The large Stokes shift is consistent with the fact that the exciton relaxes to a self-trapped state.

Original languageEnglish
Pages (from-to)874-875
Number of pages2
JournalJournal of Luminescence
Volume72-74
DOIs
Publication statusPublished - 1997 Jun
Externally publishedYes

Keywords

  • Anatase
  • Self-trapped exciton
  • Steepness index
  • TiO

ASJC Scopus subject areas

  • Biophysics
  • Atomic and Molecular Physics, and Optics
  • Chemistry(all)
  • Biochemistry
  • Condensed Matter Physics

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